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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<span class="sourceLineNo">003</span> * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<span class="sourceLineNo">007</span> * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<span class="sourceLineNo">014</span> * See the License for the specific language governing permissions and<a name="line.14"></a>
<span class="sourceLineNo">015</span> * limitations under the License.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.apache.commons.io;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.io.BufferedInputStream;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.io.BufferedOutputStream;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.BufferedReader;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.BufferedWriter;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.io.ByteArrayInputStream;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.io.CharArrayWriter;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.io.Closeable;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.io.EOFException;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.io.File;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.io.IOException;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.io.InputStream;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.io.InputStreamReader;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.io.OutputStream;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import java.io.OutputStreamWriter;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import java.io.Reader;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import java.io.Writer;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import java.net.HttpURLConnection;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import java.net.ServerSocket;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import java.net.Socket;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import java.net.URI;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import java.net.URL;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import java.net.URLConnection;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import java.nio.ByteBuffer;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import java.nio.CharBuffer;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import java.nio.channels.ReadableByteChannel;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import java.nio.channels.Selector;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import java.nio.charset.Charset;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import java.util.ArrayList;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import java.util.Collection;<a name="line.47"></a>
<span class="sourceLineNo">048</span>import java.util.List;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import java.util.Objects;<a name="line.49"></a>
<span class="sourceLineNo">050</span>import java.util.function.Consumer;<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span>import org.apache.commons.io.function.IOConsumer;<a name="line.52"></a>
<span class="sourceLineNo">053</span>import org.apache.commons.io.output.AppendableWriter;<a name="line.53"></a>
<span class="sourceLineNo">054</span>import org.apache.commons.io.output.ByteArrayOutputStream;<a name="line.54"></a>
<span class="sourceLineNo">055</span>import org.apache.commons.io.output.NullOutputStream;<a name="line.55"></a>
<span class="sourceLineNo">056</span>import org.apache.commons.io.output.StringBuilderWriter;<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>/**<a name="line.58"></a>
<span class="sourceLineNo">059</span> * General IO stream manipulation utilities.<a name="line.59"></a>
<span class="sourceLineNo">060</span> * &lt;p&gt;<a name="line.60"></a>
<span class="sourceLineNo">061</span> * This class provides static utility methods for input/output operations.<a name="line.61"></a>
<span class="sourceLineNo">062</span> * &lt;ul&gt;<a name="line.62"></a>
<span class="sourceLineNo">063</span> * &lt;li&gt;&lt;b&gt;[Deprecated]&lt;/b&gt; closeQuietly - these methods close a stream ignoring nulls and exceptions<a name="line.63"></a>
<span class="sourceLineNo">064</span> * &lt;li&gt;toXxx/read - these methods read data from a stream<a name="line.64"></a>
<span class="sourceLineNo">065</span> * &lt;li&gt;write - these methods write data to a stream<a name="line.65"></a>
<span class="sourceLineNo">066</span> * &lt;li&gt;copy - these methods copy all the data from one stream to another<a name="line.66"></a>
<span class="sourceLineNo">067</span> * &lt;li&gt;contentEquals - these methods compare the content of two streams<a name="line.67"></a>
<span class="sourceLineNo">068</span> * &lt;/ul&gt;<a name="line.68"></a>
<span class="sourceLineNo">069</span> * &lt;p&gt;<a name="line.69"></a>
<span class="sourceLineNo">070</span> * The byte-to-char methods and char-to-byte methods involve a conversion step.<a name="line.70"></a>
<span class="sourceLineNo">071</span> * Two methods are provided in each case, one that uses the platform default<a name="line.71"></a>
<span class="sourceLineNo">072</span> * encoding and the other which allows you to specify an encoding. You are<a name="line.72"></a>
<span class="sourceLineNo">073</span> * encouraged to always specify an encoding because relying on the platform<a name="line.73"></a>
<span class="sourceLineNo">074</span> * default can lead to unexpected results, for example when moving from<a name="line.74"></a>
<span class="sourceLineNo">075</span> * development to production.<a name="line.75"></a>
<span class="sourceLineNo">076</span> * &lt;p&gt;<a name="line.76"></a>
<span class="sourceLineNo">077</span> * All the methods in this class that read a stream are buffered internally.<a name="line.77"></a>
<span class="sourceLineNo">078</span> * This means that there is no cause to use a &lt;code&gt;BufferedInputStream&lt;/code&gt;<a name="line.78"></a>
<span class="sourceLineNo">079</span> * or &lt;code&gt;BufferedReader&lt;/code&gt;. The default buffer size of 4K has been shown<a name="line.79"></a>
<span class="sourceLineNo">080</span> * to be efficient in tests.<a name="line.80"></a>
<span class="sourceLineNo">081</span> * &lt;p&gt;<a name="line.81"></a>
<span class="sourceLineNo">082</span> * The various copy methods all delegate the actual copying to one of the following methods:<a name="line.82"></a>
<span class="sourceLineNo">083</span> * &lt;ul&gt;<a name="line.83"></a>
<span class="sourceLineNo">084</span> * &lt;li&gt;{@link #copyLarge(InputStream, OutputStream, byte[])}&lt;/li&gt;<a name="line.84"></a>
<span class="sourceLineNo">085</span> * &lt;li&gt;{@link #copyLarge(InputStream, OutputStream, long, long, byte[])}&lt;/li&gt;<a name="line.85"></a>
<span class="sourceLineNo">086</span> * &lt;li&gt;{@link #copyLarge(Reader, Writer, char[])}&lt;/li&gt;<a name="line.86"></a>
<span class="sourceLineNo">087</span> * &lt;li&gt;{@link #copyLarge(Reader, Writer, long, long, char[])}&lt;/li&gt;<a name="line.87"></a>
<span class="sourceLineNo">088</span> * &lt;/ul&gt;<a name="line.88"></a>
<span class="sourceLineNo">089</span> * For example, {@link #copy(InputStream, OutputStream)} calls {@link #copyLarge(InputStream, OutputStream)}<a name="line.89"></a>
<span class="sourceLineNo">090</span> * which calls {@link #copy(InputStream, OutputStream, int)} which creates the buffer and calls<a name="line.90"></a>
<span class="sourceLineNo">091</span> * {@link #copyLarge(InputStream, OutputStream, byte[])}.<a name="line.91"></a>
<span class="sourceLineNo">092</span> * &lt;p&gt;<a name="line.92"></a>
<span class="sourceLineNo">093</span> * Applications can re-use buffers by using the underlying methods directly.<a name="line.93"></a>
<span class="sourceLineNo">094</span> * This may improve performance for applications that need to do a lot of copying.<a name="line.94"></a>
<span class="sourceLineNo">095</span> * &lt;p&gt;<a name="line.95"></a>
<span class="sourceLineNo">096</span> * Wherever possible, the methods in this class do &lt;em&gt;not&lt;/em&gt; flush or close<a name="line.96"></a>
<span class="sourceLineNo">097</span> * the stream. This is to avoid making non-portable assumptions about the<a name="line.97"></a>
<span class="sourceLineNo">098</span> * streams' origin and further use. Thus the caller is still responsible for<a name="line.98"></a>
<span class="sourceLineNo">099</span> * closing streams after use.<a name="line.99"></a>
<span class="sourceLineNo">100</span> * &lt;p&gt;<a name="line.100"></a>
<span class="sourceLineNo">101</span> * Origin of code: Excalibur.<a name="line.101"></a>
<span class="sourceLineNo">102</span> */<a name="line.102"></a>
<span class="sourceLineNo">103</span>public class IOUtils {<a name="line.103"></a>
<span class="sourceLineNo">104</span>    // NOTE: This class is focused on InputStream, OutputStream, Reader and<a name="line.104"></a>
<span class="sourceLineNo">105</span>    // Writer. Each method should take at least one of these as a parameter,<a name="line.105"></a>
<span class="sourceLineNo">106</span>    // or return one of them.<a name="line.106"></a>
<span class="sourceLineNo">107</span><a name="line.107"></a>
<span class="sourceLineNo">108</span>    private static final byte[] EMPTY_BYTE_ARRAY = new byte[0];<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span>    /**<a name="line.110"></a>
<span class="sourceLineNo">111</span>     * The default buffer size ({@value}) to use in copy methods.<a name="line.111"></a>
<span class="sourceLineNo">112</span>     */<a name="line.112"></a>
<span class="sourceLineNo">113</span>    public static final int DEFAULT_BUFFER_SIZE = 8192;<a name="line.113"></a>
<span class="sourceLineNo">114</span><a name="line.114"></a>
<span class="sourceLineNo">115</span>    /**<a name="line.115"></a>
<span class="sourceLineNo">116</span>     * The system directory separator character.<a name="line.116"></a>
<span class="sourceLineNo">117</span>     */<a name="line.117"></a>
<span class="sourceLineNo">118</span>    public static final char DIR_SEPARATOR = File.separatorChar;<a name="line.118"></a>
<span class="sourceLineNo">119</span><a name="line.119"></a>
<span class="sourceLineNo">120</span>    /**<a name="line.120"></a>
<span class="sourceLineNo">121</span>     * The Unix directory separator character.<a name="line.121"></a>
<span class="sourceLineNo">122</span>     */<a name="line.122"></a>
<span class="sourceLineNo">123</span>    public static final char DIR_SEPARATOR_UNIX = '/';<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span>    /**<a name="line.125"></a>
<span class="sourceLineNo">126</span>     * The Windows directory separator character.<a name="line.126"></a>
<span class="sourceLineNo">127</span>     */<a name="line.127"></a>
<span class="sourceLineNo">128</span>    public static final char DIR_SEPARATOR_WINDOWS = '\\';<a name="line.128"></a>
<span class="sourceLineNo">129</span><a name="line.129"></a>
<span class="sourceLineNo">130</span>    /**<a name="line.130"></a>
<span class="sourceLineNo">131</span>     * Represents the end-of-file (or stream).<a name="line.131"></a>
<span class="sourceLineNo">132</span>     * @since 2.5 (made public)<a name="line.132"></a>
<span class="sourceLineNo">133</span>     */<a name="line.133"></a>
<span class="sourceLineNo">134</span>    public static final int EOF = -1;<a name="line.134"></a>
<span class="sourceLineNo">135</span><a name="line.135"></a>
<span class="sourceLineNo">136</span>    /**<a name="line.136"></a>
<span class="sourceLineNo">137</span>     * The system line separator string.<a name="line.137"></a>
<span class="sourceLineNo">138</span>     * <a name="line.138"></a>
<span class="sourceLineNo">139</span>     * @deprecated Use {@link System#lineSeparator()}.<a name="line.139"></a>
<span class="sourceLineNo">140</span>     */<a name="line.140"></a>
<span class="sourceLineNo">141</span>    @Deprecated<a name="line.141"></a>
<span class="sourceLineNo">142</span>    public static final String LINE_SEPARATOR = System.lineSeparator();<a name="line.142"></a>
<span class="sourceLineNo">143</span><a name="line.143"></a>
<span class="sourceLineNo">144</span>    /**<a name="line.144"></a>
<span class="sourceLineNo">145</span>     * The Unix line separator string.<a name="line.145"></a>
<span class="sourceLineNo">146</span>     */<a name="line.146"></a>
<span class="sourceLineNo">147</span>    public static final String LINE_SEPARATOR_UNIX = "\n";<a name="line.147"></a>
<span class="sourceLineNo">148</span><a name="line.148"></a>
<span class="sourceLineNo">149</span>    /**<a name="line.149"></a>
<span class="sourceLineNo">150</span>     * The Windows line separator string.<a name="line.150"></a>
<span class="sourceLineNo">151</span>     */<a name="line.151"></a>
<span class="sourceLineNo">152</span>    public static final String LINE_SEPARATOR_WINDOWS = "\r\n";<a name="line.152"></a>
<span class="sourceLineNo">153</span><a name="line.153"></a>
<span class="sourceLineNo">154</span>    /**<a name="line.154"></a>
<span class="sourceLineNo">155</span>     * The default buffer to use for the skip() methods.<a name="line.155"></a>
<span class="sourceLineNo">156</span>     */<a name="line.156"></a>
<span class="sourceLineNo">157</span>    private static final byte[] SKIP_BYTE_BUFFER = new byte[DEFAULT_BUFFER_SIZE];<a name="line.157"></a>
<span class="sourceLineNo">158</span>    <a name="line.158"></a>
<span class="sourceLineNo">159</span>    // Allocated in the relevant skip method if necessary.<a name="line.159"></a>
<span class="sourceLineNo">160</span>    /*<a name="line.160"></a>
<span class="sourceLineNo">161</span>     * These buffers are static and are shared between threads.<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * This is possible because the buffers are write-only - the contents are never read.<a name="line.162"></a>
<span class="sourceLineNo">163</span>     *<a name="line.163"></a>
<span class="sourceLineNo">164</span>     * N.B. there is no need to synchronize when creating these because:<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * - we don't care if the buffer is created multiple times (the data is ignored)<a name="line.165"></a>
<span class="sourceLineNo">166</span>     * - we always use the same size buffer, so if it it is recreated it will still be OK<a name="line.166"></a>
<span class="sourceLineNo">167</span>     * (if the buffer size were variable, we would need to synch. to ensure some other thread<a name="line.167"></a>
<span class="sourceLineNo">168</span>     * did not create a smaller one)<a name="line.168"></a>
<span class="sourceLineNo">169</span>     */<a name="line.169"></a>
<span class="sourceLineNo">170</span>    private static char[] SKIP_CHAR_BUFFER;<a name="line.170"></a>
<span class="sourceLineNo">171</span><a name="line.171"></a>
<span class="sourceLineNo">172</span>    /**<a name="line.172"></a>
<span class="sourceLineNo">173</span>     * Returns the given InputStream if it is already a {@link BufferedInputStream}, otherwise creates a<a name="line.173"></a>
<span class="sourceLineNo">174</span>     * BufferedInputStream from the given InputStream.<a name="line.174"></a>
<span class="sourceLineNo">175</span>     *<a name="line.175"></a>
<span class="sourceLineNo">176</span>     * @param inputStream the InputStream to wrap or return (not null)<a name="line.176"></a>
<span class="sourceLineNo">177</span>     * @return the given InputStream or a new {@link BufferedInputStream} for the given InputStream<a name="line.177"></a>
<span class="sourceLineNo">178</span>     * @throws NullPointerException if the input parameter is null<a name="line.178"></a>
<span class="sourceLineNo">179</span>     * @since 2.5<a name="line.179"></a>
<span class="sourceLineNo">180</span>     */<a name="line.180"></a>
<span class="sourceLineNo">181</span>    @SuppressWarnings("resource") // parameter null check<a name="line.181"></a>
<span class="sourceLineNo">182</span>    public static BufferedInputStream buffer(final InputStream inputStream) {<a name="line.182"></a>
<span class="sourceLineNo">183</span>        // reject null early on rather than waiting for IO operation to fail<a name="line.183"></a>
<span class="sourceLineNo">184</span>        // not checked by BufferedInputStream<a name="line.184"></a>
<span class="sourceLineNo">185</span>        Objects.requireNonNull(inputStream, "inputStream");<a name="line.185"></a>
<span class="sourceLineNo">186</span>        return inputStream instanceof BufferedInputStream ?<a name="line.186"></a>
<span class="sourceLineNo">187</span>                (BufferedInputStream) inputStream : new BufferedInputStream(inputStream);<a name="line.187"></a>
<span class="sourceLineNo">188</span>    }<a name="line.188"></a>
<span class="sourceLineNo">189</span><a name="line.189"></a>
<span class="sourceLineNo">190</span>    /**<a name="line.190"></a>
<span class="sourceLineNo">191</span>     * Returns the given InputStream if it is already a {@link BufferedInputStream}, otherwise creates a<a name="line.191"></a>
<span class="sourceLineNo">192</span>     * BufferedInputStream from the given InputStream.<a name="line.192"></a>
<span class="sourceLineNo">193</span>     *<a name="line.193"></a>
<span class="sourceLineNo">194</span>     * @param inputStream the InputStream to wrap or return (not null)<a name="line.194"></a>
<span class="sourceLineNo">195</span>     * @param size the buffer size, if a new BufferedInputStream is created.<a name="line.195"></a>
<span class="sourceLineNo">196</span>     * @return the given InputStream or a new {@link BufferedInputStream} for the given InputStream<a name="line.196"></a>
<span class="sourceLineNo">197</span>     * @throws NullPointerException if the input parameter is null<a name="line.197"></a>
<span class="sourceLineNo">198</span>     * @since 2.5<a name="line.198"></a>
<span class="sourceLineNo">199</span>     */<a name="line.199"></a>
<span class="sourceLineNo">200</span>    @SuppressWarnings("resource") // parameter null check<a name="line.200"></a>
<span class="sourceLineNo">201</span>    public static BufferedInputStream buffer(final InputStream inputStream, final int size) {<a name="line.201"></a>
<span class="sourceLineNo">202</span>        // reject null early on rather than waiting for IO operation to fail<a name="line.202"></a>
<span class="sourceLineNo">203</span>        // not checked by BufferedInputStream<a name="line.203"></a>
<span class="sourceLineNo">204</span>        Objects.requireNonNull(inputStream, "inputStream");<a name="line.204"></a>
<span class="sourceLineNo">205</span>        return inputStream instanceof BufferedInputStream ?<a name="line.205"></a>
<span class="sourceLineNo">206</span>                (BufferedInputStream) inputStream : new BufferedInputStream(inputStream, size);<a name="line.206"></a>
<span class="sourceLineNo">207</span>    }<a name="line.207"></a>
<span class="sourceLineNo">208</span><a name="line.208"></a>
<span class="sourceLineNo">209</span>    /**<a name="line.209"></a>
<span class="sourceLineNo">210</span>     * Returns the given OutputStream if it is already a {@link BufferedOutputStream}, otherwise creates a<a name="line.210"></a>
<span class="sourceLineNo">211</span>     * BufferedOutputStream from the given OutputStream.<a name="line.211"></a>
<span class="sourceLineNo">212</span>     *<a name="line.212"></a>
<span class="sourceLineNo">213</span>     * @param outputStream the OutputStream to wrap or return (not null)<a name="line.213"></a>
<span class="sourceLineNo">214</span>     * @return the given OutputStream or a new {@link BufferedOutputStream} for the given OutputStream<a name="line.214"></a>
<span class="sourceLineNo">215</span>     * @throws NullPointerException if the input parameter is null<a name="line.215"></a>
<span class="sourceLineNo">216</span>     * @since 2.5<a name="line.216"></a>
<span class="sourceLineNo">217</span>     */<a name="line.217"></a>
<span class="sourceLineNo">218</span>    @SuppressWarnings("resource") // parameter null check<a name="line.218"></a>
<span class="sourceLineNo">219</span>    public static BufferedOutputStream buffer(final OutputStream outputStream) {<a name="line.219"></a>
<span class="sourceLineNo">220</span>        // reject null early on rather than waiting for IO operation to fail<a name="line.220"></a>
<span class="sourceLineNo">221</span>        // not checked by BufferedInputStream<a name="line.221"></a>
<span class="sourceLineNo">222</span>        Objects.requireNonNull(outputStream, "outputStream");<a name="line.222"></a>
<span class="sourceLineNo">223</span>        return outputStream instanceof BufferedOutputStream ?<a name="line.223"></a>
<span class="sourceLineNo">224</span>                (BufferedOutputStream) outputStream : new BufferedOutputStream(outputStream);<a name="line.224"></a>
<span class="sourceLineNo">225</span>    }<a name="line.225"></a>
<span class="sourceLineNo">226</span><a name="line.226"></a>
<span class="sourceLineNo">227</span>    /**<a name="line.227"></a>
<span class="sourceLineNo">228</span>     * Returns the given OutputStream if it is already a {@link BufferedOutputStream}, otherwise creates a<a name="line.228"></a>
<span class="sourceLineNo">229</span>     * BufferedOutputStream from the given OutputStream.<a name="line.229"></a>
<span class="sourceLineNo">230</span>     *<a name="line.230"></a>
<span class="sourceLineNo">231</span>     * @param outputStream the OutputStream to wrap or return (not null)<a name="line.231"></a>
<span class="sourceLineNo">232</span>     * @param size the buffer size, if a new BufferedOutputStream is created.<a name="line.232"></a>
<span class="sourceLineNo">233</span>     * @return the given OutputStream or a new {@link BufferedOutputStream} for the given OutputStream<a name="line.233"></a>
<span class="sourceLineNo">234</span>     * @throws NullPointerException if the input parameter is null<a name="line.234"></a>
<span class="sourceLineNo">235</span>     * @since 2.5<a name="line.235"></a>
<span class="sourceLineNo">236</span>     */<a name="line.236"></a>
<span class="sourceLineNo">237</span>    @SuppressWarnings("resource") // parameter null check<a name="line.237"></a>
<span class="sourceLineNo">238</span>    public static BufferedOutputStream buffer(final OutputStream outputStream, final int size) {<a name="line.238"></a>
<span class="sourceLineNo">239</span>        // reject null early on rather than waiting for IO operation to fail<a name="line.239"></a>
<span class="sourceLineNo">240</span>        // not checked by BufferedInputStream<a name="line.240"></a>
<span class="sourceLineNo">241</span>        Objects.requireNonNull(outputStream, "outputStream");<a name="line.241"></a>
<span class="sourceLineNo">242</span>        return outputStream instanceof BufferedOutputStream ?<a name="line.242"></a>
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<span class="sourceLineNo">245</span><a name="line.245"></a>
<span class="sourceLineNo">246</span>    /**<a name="line.246"></a>
<span class="sourceLineNo">247</span>     * Returns the given reader if it is already a {@link BufferedReader}, otherwise creates a BufferedReader from<a name="line.247"></a>
<span class="sourceLineNo">248</span>     * the given reader.<a name="line.248"></a>
<span class="sourceLineNo">249</span>     *<a name="line.249"></a>
<span class="sourceLineNo">250</span>     * @param reader the reader to wrap or return (not null)<a name="line.250"></a>
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<span class="sourceLineNo">259</span>    /**<a name="line.259"></a>
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<span class="sourceLineNo">261</span>     * given reader.<a name="line.261"></a>
<span class="sourceLineNo">262</span>     *<a name="line.262"></a>
<span class="sourceLineNo">263</span>     * @param reader the reader to wrap or return (not null)<a name="line.263"></a>
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<span class="sourceLineNo">275</span>     * given Writer.<a name="line.275"></a>
<span class="sourceLineNo">276</span>     *<a name="line.276"></a>
<span class="sourceLineNo">277</span>     * @param writer the Writer to wrap or return (not null)<a name="line.277"></a>
<span class="sourceLineNo">278</span>     * @return the given Writer or a new {@link BufferedWriter} for the given Writer<a name="line.278"></a>
<span class="sourceLineNo">279</span>     * @throws NullPointerException if the input parameter is null<a name="line.279"></a>
<span class="sourceLineNo">280</span>     * @since 2.5<a name="line.280"></a>
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<span class="sourceLineNo">286</span>    /**<a name="line.286"></a>
<span class="sourceLineNo">287</span>     * Returns the given Writer if it is already a {@link BufferedWriter}, otherwise creates a BufferedWriter from the<a name="line.287"></a>
<span class="sourceLineNo">288</span>     * given Writer.<a name="line.288"></a>
<span class="sourceLineNo">289</span>     *<a name="line.289"></a>
<span class="sourceLineNo">290</span>     * @param writer the Writer to wrap or return (not null)<a name="line.290"></a>
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<span class="sourceLineNo">292</span>     * @return the given Writer or a new {@link BufferedWriter} for the given Writer<a name="line.292"></a>
<span class="sourceLineNo">293</span>     * @throws NullPointerException if the input parameter is null<a name="line.293"></a>
<span class="sourceLineNo">294</span>     * @since 2.5<a name="line.294"></a>
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<span class="sourceLineNo">299</span><a name="line.299"></a>
<span class="sourceLineNo">300</span>    /**<a name="line.300"></a>
<span class="sourceLineNo">301</span>     * Closes the given {@link Closeable} as a null-safe operation.<a name="line.301"></a>
<span class="sourceLineNo">302</span>     *<a name="line.302"></a>
<span class="sourceLineNo">303</span>     * @param closeable The resource to close, may be null.<a name="line.303"></a>
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<span class="sourceLineNo">381</span>     * Closing all streams:<a name="line.381"></a>
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<span class="sourceLineNo">383</span>     * &lt;pre&gt;<a name="line.383"></a>
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<span class="sourceLineNo">394</span>     *<a name="line.394"></a>
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<span class="sourceLineNo">396</span>     * suppressed exceptions manually.<a name="line.396"></a>
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<span class="sourceLineNo">403</span><a name="line.403"></a>
<span class="sourceLineNo">404</span>    /**<a name="line.404"></a>
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<span class="sourceLineNo">406</span>     * &lt;p&gt;<a name="line.406"></a>
<span class="sourceLineNo">407</span>     * Equivalent to {@link Closeable#close()}, except any exceptions will be ignored.<a name="line.407"></a>
<span class="sourceLineNo">408</span>     * &lt;p&gt;<a name="line.408"></a>
<span class="sourceLineNo">409</span>     * This is typically used in finally blocks to ensure that the closeable is closed<a name="line.409"></a>
<span class="sourceLineNo">410</span>     * even if an Exception was thrown before the normal close statement was reached.<a name="line.410"></a>
<span class="sourceLineNo">411</span>     * &lt;br&gt;<a name="line.411"></a>
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<span class="sourceLineNo">413</span>     * which should be present for the non-exceptional case.&lt;/b&gt;<a name="line.413"></a>
<span class="sourceLineNo">414</span>     * &lt;br&gt;<a name="line.414"></a>
<span class="sourceLineNo">415</span>     * It is only intended to simplify tidying up where normal processing has already failed<a name="line.415"></a>
<span class="sourceLineNo">416</span>     * and reporting close failure as well is not necessary or useful.<a name="line.416"></a>
<span class="sourceLineNo">417</span>     * &lt;p&gt;<a name="line.417"></a>
<span class="sourceLineNo">418</span>     * Example code:<a name="line.418"></a>
<span class="sourceLineNo">419</span>     * &lt;/p&gt;<a name="line.419"></a>
<span class="sourceLineNo">420</span>     * &lt;pre&gt;<a name="line.420"></a>
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<span class="sourceLineNo">432</span>     * &lt;p&gt;<a name="line.432"></a>
<span class="sourceLineNo">433</span>     * Closing all streams:<a name="line.433"></a>
<span class="sourceLineNo">434</span>     * &lt;br&gt;<a name="line.434"></a>
<span class="sourceLineNo">435</span>     * &lt;pre&gt;<a name="line.435"></a>
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<span class="sourceLineNo">448</span>     * suppressed exceptions manually.<a name="line.448"></a>
<span class="sourceLineNo">449</span>     * @see Throwable#addSuppressed(java.lang.Throwable)<a name="line.449"></a>
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<span class="sourceLineNo">452</span>    public static void closeQuietly(final Closeable... closeables) {<a name="line.452"></a>
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<span class="sourceLineNo">456</span>        for (final Closeable closeable : closeables) {<a name="line.456"></a>
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<span class="sourceLineNo">461</span>    /**<a name="line.461"></a>
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<span class="sourceLineNo">463</span>     *<a name="line.463"></a>
<span class="sourceLineNo">464</span>     * @param closeable The resource to close, may be null.<a name="line.464"></a>
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<span class="sourceLineNo">482</span>     * &lt;p&gt;<a name="line.482"></a>
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<span class="sourceLineNo">709</span>     *<a name="line.709"></a>
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<span class="sourceLineNo">1067</span>     * &lt;a href="http://www.iana.org/assignments/character-sets"&gt;IANA&lt;/a&gt;.<a name="line.1067"></a>
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<span class="sourceLineNo">3289</span>            lineEnding = System.lineSeparator();<a name="line.3289"></a>
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<span class="sourceLineNo">3294</span>                output.write(line.toString().getBytes(cs));<a name="line.3294"></a>
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<span class="sourceLineNo">3304</span>     * &lt;p&gt;<a name="line.3304"></a>
<span class="sourceLineNo">3305</span>     * Character encoding names can be found at<a name="line.3305"></a>
<span class="sourceLineNo">3306</span>     * &lt;a href="http://www.iana.org/assignments/character-sets"&gt;IANA&lt;/a&gt;.<a name="line.3306"></a>
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<span class="sourceLineNo">3314</span>     * @throws java.nio.charset.UnsupportedCharsetException thrown instead of {@link java.io<a name="line.3314"></a>
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<span class="sourceLineNo">3324</span>    /**<a name="line.3324"></a>
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<span class="sourceLineNo">3344</span>            if (line != null) {<a name="line.3344"></a>
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<span class="sourceLineNo">3363</span>            return (Writer) appendable;<a name="line.3363"></a>
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<span class="sourceLineNo">3368</span>        return new AppendableWriter&lt;&gt;(appendable);<a name="line.3368"></a>
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<span class="sourceLineNo">3371</span>    /**<a name="line.3371"></a>
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<span class="sourceLineNo">3378</span>}<a name="line.3378"></a>




























































</pre>
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